As one might expect from this error message, the forums also do not seem to be sending email notification of replies.

I reported notageek's informative post above to call the attention of our illustrious, talented, and hard-working Admins to the issue, on the off chance they are not already virtually finished speedily resolving the problem._________________Deja Moo: the feeling that you've heard this bull before

It seems that in the process of doing some minor housekeeping in the board configuration some bits that shall not be twiddled were in fact twiddled, thus releasing the fury of the mailer daemon into the world. Restoring their previous state appears to have returned the daemon to a proper state of quiescence.

It would have been fixed sooner, were there not so many interesting shops nestled down blind alleys.